Title :
Influence of environment on the fatigue of Pb-Sn solder joints
Author :
Guo, Zhenfeng ; Sprecher, A.F. ; Jung, Dae Young ; Conrad, H.
Author_Institution :
Dept. of Mater. Sci. & Eng., North Carolina State Univ., Raleigh, NC, USA
fDate :
12/1/1991 12:00:00 AM
Abstract :
The effect of a vacuum (~10-6 torr) on the low cycle fatigue life (25, 50, 75, and 95% drop in load) of 10Sn90Pb and 63Sn37Pb solder joints tested in shear was investigated in total strain control (Δγt=0.006 to 0.5, υ=0.1 Hz ramp cycling) at 300 K. The influence of a grease coating was determined for the 63Sn37Pb alloy for Δγt=0.07=0.80. No clear effect of vacuum occurred for the strain range considered. The grease coating improved fatigue life for a constant total strain range. Possible explanations for the observed effects are given
Keywords :
fatigue testing; lead alloys; soldering; tin alloys; 0.1 Hz; 10Sn90Pb alloys; 1E-6 torr; 300 K; 63Sn37Pb alloy; Pb-Sn solder joints; constant total strain range; environment influence; fatigue; grease coating; low cycle fatigue life; ramp cycling; shear stress; tested in shear; total strain control; vacuum; Assembly; Capacitive sensors; Coatings; Copper; Electronic components; Fatigue; Life testing; Soldering; Strain control; Stress;
Journal_Title :
Components, Hybrids, and Manufacturing Technology, IEEE Transactions on
